Abstract:
The present invention provides an improved amorphization/templated recrystallization (ATR) method for fabricating low-defect-density hybrid orientation substrates. ATR methods for hybrid orientation substrate fabrication generally start with a Si layer having a first orientation bonded to a second Si layer or substrate having a second orientation. Selected regions of the first Si layer are amorphized and then recrystallized into the orientation of the second Si layer by using the second Si layer as a template. In particular, this invention provides a melt-recrystallization ATR method, for use alone or in combination with non-melt-recrystallization ATR methods, in which selected Si regions bounded by dielectric-filled trenches are induced to undergo an orientation change by the steps of preamorphization, laser-induced melting, and corner-defect-free templated recrystallization from the melt.
Abstract:
Hybrid orientation substrates allow the fabrication of complementary metal oxide semiconductor (CMOS) circuits in which the n-type field effect transistors (nFETs) are disposed in a semiconductor orientation which is optimal for electron mobility and the p-type field effect transistors (pFETs) are disposed in a semiconductor orientation which is optimal for hole mobility. This invention discloses that the performance advantages of FETs formed entirely in the optimal semiconductor orientation may be achieved by only requiring that the device's channel be disposed in a semiconductor with the optimal orientation. A variety of new FET structures are described, all with the characteristic that at least some part of the FET's channel has a different orientation than at least some part of the FET's source and/or drain. Hybrid substrates into which these new FETs might be incorporated are described along with their methods of making.
Abstract:
The present invention provides an improved amorphization/ templated recrystallization (ATR) method for fabricating low-defect-density hybrid orientation substrates. ATR methods for hybrid orientation substrate fabrication generally start with a Si layer having a first orientation bonded to a second Si layer or substrate having a second orientation. Selected regions of the first Si layer are amorphized and then recrystallized into the orientation of the second Si layer by using the second Si layer as a template. The process flow of the present invention solves two major difficulties not disclosed by prior art ATR methods: the creation of "corner defects" at the edges of amorphized Si regions bounded by trenches, and undesired orientation changes during a high temperature post-recrystallization defect-removal annealing of non-ATR'd regions not bounded by trenches. In particular, this invention provides a process flow comprisng the steps of (i) amorphization and low-temperature recrystallization performed in substrate regions free of trenches; (ii) formation of trench isolation regions that subsume the defective regions at the edge of the ATR'd regions, and (iii) a high-temperature defect-removal anneal performed with the trench isolation regions in place.
Abstract:
The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a -containing layer having a 110 crystal orientation and a biaxial compressive strain. The term ''biaxial compressive stress'' is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing 110 layer; and creating a biaxial strain in the silicon-containing 110 layer.
Abstract:
The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing layer; and creating a biaxial strain in the silicon-containing layer.
Abstract:
Strukturen und Verfahren zum Verdecken eines Objekts vor elektromagnetischer Strahlung bei den Mikrowellen- und Terahertz-Frequenzen beinhalten das Aufbringen einer Vielzahl von dünnen Lagen aus Graphen um das Objekt herum. Zwischenschichten aus einem transparenten dielektrischen Material können zwischen den dünnen Lagen aus Graphen aufgebracht sein, um die Leistungsfähigkeit zu optimieren. In weiteren Ausführungsformen kann das Graphen in eine Anstrichformulierung oder ein Gewebe formuliert und an dem Objekt angebracht sein. Die Strukturen und Verfahren absorbieren wenigstens einen Anteil der elektromagnetischen Strahlung bei den Mikrowellen- und Terabyte-Frequenzen.
Abstract:
In the claimed mixed-crystal-orientation channel FET, source/drain regions above the bonded interface 360 have the orientation of the upper semiconductor 350 and source/drain regions below the bonded interface 360 have the orientation of the lower semiconductor 370, so that each part of the source/drain has the same crystal orientation as the semiconductor material laterally adjacent to it. Optional source/drain extensions 392 are disposed entirely in the upper semiconductor layer 350. Optionally, the bonded interface 360 is situated towards the bottom of source/drain regions 380, leaving source/drains 380 mostly in upper semiconductor layer 350.
Abstract:
The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a -containing layer having a 110 crystal orientation and a biaxial compressive strain. The term ''biaxial compressive stress'' is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing 110 layer; and creating a biaxial strain in the silicon-containing 110 layer.
Abstract:
The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a -containing layer having a 110 crystal orientation and a biaxial compressive strain. The term ''biaxial compressive stress'' is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing 110 layer; and creating a biaxial strain in the silicon-containing 110 layer.
Abstract:
Strukturen zum Abschirmen elektromagnetischer Störungen und Verfahren zum Abschirmen eines Objekts vor elektromagnetischer Strahlung bei Frequenzen, die höher als ein Megahertz sind, beinhalten im Allgemeinen das Bereitstellen hoch dotierter dünner Lagen aus Graphen um das abzuschirmende Objekt herum. Die hoch dotierten dünnen Lagen aus Graphen können eine Dotierstoffkonzentration, die höher als > 1e1013 cm–2 ist, die dahingehend wirksam ist, dass die elektromagnetische Strahlung reflektiert wird, oder eine Dotierstoffkonzentration von 1e1013 cm–2 > n > 0 cm–2 aufweisen, die dahingehend wirksam ist, dass die elektromagnetische Strahlung absorbiert wird.